body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #2b2b30;
    color: #e8e8ea;
    font-family: "Segoe UI", system-ui, sans-serif;
}

#app {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    box-sizing: border-box;
    height: 100vh;
}

#controls {
    width: 240px;
    flex: 0 0 auto;
    background: #34343b;
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

#controls h1 {
    margin: 0 0 16px;
    font-size: 22px;
    letter-spacing: 1px;
    color: #7fd1b9;
}

#controls label {
    display: block;
    margin-bottom: 14px;
    font-size: 13px;
}

#controls label span {
    display: block;
    margin-bottom: 5px;
    color: #c7c7cc;
}

#controls label em {
    float: right;
    font-style: normal;
    color: #7fd1b9;
}

#controls input[type="range"] {
    width: 100%;
    accent-color: #7fd1b9;
}

.seed-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.seed-row span {
    flex: 0 0 auto;
    margin: 0 !important;
}

.seed-row input[type="number"] {
    flex: 1 1 auto;
    width: 85%;
    min-width: 0;
    background: #26262b;
    border: 1px solid #4a4a52;
    color: #e8e8ea;
    border-radius: 5px;
    padding: 5px 6px;
    box-sizing: border-box;
}

.seed-row button {
    flex: 0 0 auto;
    background: #7fd1b9;
    border: none;
    color: #1c1c20;
    font-size: 16px;
    border-radius: 5px;
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.seed-row button:hover {
    background: #98e0cb;
}

.toggle-btn {
    width: 100%;
    padding: 8px;
    margin-bottom: 4px;
    background: #26262b;
    border: 1px solid #4a4a52;
    color: #e8e8ea;
    border-radius: 5px;
    font-size: 13px;
    cursor: pointer;
}

.toggle-btn:hover {
    background: #3a3a42;
}

.toggle-btn.active {
    background: #7fd1b9;
    border-color: #7fd1b9;
    color: #1c1c20;
}

#canvas {
    display: block;
    border-radius: 6px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
    background-color: #0c245c;
}

#legend {
    margin-top: 18px;
    border-top: 1px solid #4a4a52;
    padding-top: 14px;
}

#legend h2 {
    margin: 0 0 10px;
    font-size: 14px;
    font-weight: 600;
    color: #c7c7cc;
}

#legendList {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.legend-row {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: #c7c7cc;
}

.legend-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex: 0 0 auto;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.3);
}

.legend-label {
    font-variant-numeric: tabular-nums;
}